You will get AI Product Strategy Session
Top Rated
Project details
You will get a custom corporate SaaS system built by one of Upwork’s most recognized developers with a proven track record of $5M+ in delivered projects since 2022. I specialize in designing and developing secure, scalable, and user-friendly platforms that help companies streamline operations, improve productivity, and achieve measurable business outcomes.
My process covers everything from system architecture and backend development to modern UX/UI design, cloud setup (AWS/GCP/Azure), and API integrations. The result is a tailored SaaS platform that not only looks professional but also scales effortlessly as your business grows.
I solve key problems for enterprises, including fragmented workflows, poor usability in legacy tools, and the need for compliance-ready infrastructure.
With experience across industries like FinTech, Health & Wellness, LegalTech, Industrial SaaS, and Retail, I know how to balance technical depth with practical outcomes. Unlike many freelancers, I don’t just deliver code — I deliver business value.
Let’s build a SaaS solution that empowers your organization, enhances efficiency, and positions you ahead of the competition.
My process covers everything from system architecture and backend development to modern UX/UI design, cloud setup (AWS/GCP/Azure), and API integrations. The result is a tailored SaaS platform that not only looks professional but also scales effortlessly as your business grows.
I solve key problems for enterprises, including fragmented workflows, poor usability in legacy tools, and the need for compliance-ready infrastructure.
With experience across industries like FinTech, Health & Wellness, LegalTech, Industrial SaaS, and Retail, I know how to balance technical depth with practical outcomes. Unlike many freelancers, I don’t just deliver code — I deliver business value.
Let’s build a SaaS solution that empowers your organization, enhances efficiency, and positions you ahead of the competition.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, DesignWhat's included $1,000
These options are included with the project scope.
$1,000
- Delivery Time 30 days
- Number of Revisions 5
- Number of Pages 10
58 reviews
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SR
Shifa R.
Aug 3, 2026
Full-Stack Web Developer with React and Storyblok
DB
Dana B.
Jul 1, 2026
Ongoing Mobile Development (BT - 605083)
Bohdan has done great work supporting our mobile app development efforts. He works quickly, communicates well, and consistently delivers quality results. He has been reliable, professional, and always a pleasure to work with.
I would highly recommend Bohdan to any team looking for strong mobile app development support.
I would highly recommend Bohdan to any team looking for strong mobile app development support.
JB
Jay B.
May 19, 2026
30 minute consultation
Denis is incredibly professional, detailed-oriented, and well experienced within the field. I'd recommend anyone consider his services for their project.
DB
Dana B.
May 4, 2026
Ongoing Full Stack Development (VD - 561086)
We really enjoyed working with him and appreciated the range he brought as a full stack developer. He was able to contribute across the application, from building user-facing functionality to supporting the underlying logic and integrations needed to make everything work smoothly.
He was thoughtful in how he approached development, dependable with assigned work, and clear in his communication. We appreciated that he could take a feature or technical requirement, work through the details, and deliver something functional and well-structured.
He was professional, collaborative, and easy to work with throughout the engagement. We would gladly work with him again and recommend him to anyone looking for a capable full stack developer who can contribute across multiple layers of a product.
He was thoughtful in how he approached development, dependable with assigned work, and clear in his communication. We appreciated that he could take a feature or technical requirement, work through the details, and deliver something functional and well-structured.
He was professional, collaborative, and easy to work with throughout the engagement. We would gladly work with him again and recommend him to anyone looking for a capable full stack developer who can contribute across multiple layers of a product.
DB
Dana B.
May 4, 2026
Ongoing Front-End Development (PM - 564400)
We had a great experience working with him on front-end development. He brought a strong eye for usability, clean implementation, and thoughtful attention to the details that make an application feel polished and easy to use.
He was able to take requirements and design direction and turn them into functional, well-structured front-end components. He communicated clearly, worked efficiently, and was responsive when adjustments or refinements were needed.
We appreciated his professionalism, consistency, and ability to support the user-facing side of the product with care. He was a dependable contributor, and we would gladly recommend him to anyone looking for a skilled front-end developer.
He was able to take requirements and design direction and turn them into functional, well-structured front-end components. He communicated clearly, worked efficiently, and was responsive when adjustments or refinements were needed.
We appreciated his professionalism, consistency, and ability to support the user-facing side of the product with care. He was a dependable contributor, and we would gladly recommend him to anyone looking for a skilled front-end developer.
About Denis
Full Stack Developer | Full Stack Developer React Node React Native
99%
Job Success
Kharkiv, Ukraine - 11:12 pm local time
𝐈𝐟 𝐲𝐨𝐮'𝐫𝐞 𝐧𝐨𝐭 𝐬𝐮𝐫𝐞 𝐚𝐛𝐨𝐮𝐭 𝐲𝐨𝐮𝐫 𝐢𝐝𝐞𝐚, 𝐣𝐮𝐬𝐭 𝐬𝐞𝐧𝐝 𝐦𝐞 𝐲𝐨𝐮𝐫 𝐛𝐚𝐬𝐢𝐜 𝐬𝐩𝐞𝐜𝐬 𝐨𝐫 𝐑𝐅𝐏, 𝐚𝐧𝐝 𝐈'𝐥𝐥 𝐭𝐮𝐫𝐧 𝐢𝐭 𝐢𝐧𝐭𝐨 𝐚𝐧 𝐀𝐈 𝐩𝐫𝐨𝐭𝐨𝐭𝐲𝐩𝐞 𝐰𝐢𝐭𝐡𝐢𝐧 𝟑𝟎 𝐦𝐢𝐧𝐮𝐭𝐞𝐬 𝐚𝐭 𝐧𝐨 𝐜𝐡𝐚𝐫𝐠𝐞. 𝐅𝐨𝐫 𝐦𝐞, 𝐢𝐭'𝐬 𝐣𝐮𝐬𝐭 𝟑𝟎 𝐦𝐢𝐧𝐮𝐭𝐞𝐬 𝐨𝐟 𝐰𝐨𝐫𝐤. 𝐅𝐨𝐫 𝐲𝐨𝐮, 𝐢𝐭'𝐬 𝐚 𝐠𝐫𝐞𝐚𝐭 𝐰𝐚𝐲 𝐭𝐨 𝐯𝐚𝐥𝐢𝐝𝐚𝐭𝐞 𝐲𝐨𝐮𝐫 𝐢𝐝𝐞𝐚 𝐛𝐞𝐟𝐨𝐫𝐞 𝐢𝐧𝐯𝐞𝐬𝐭𝐢𝐧𝐠 𝐟𝐮𝐫𝐭𝐡𝐞𝐫.
I'm an AI Product Engineer with a focus on helping startups and businesses leverage AI and adapt to the modern software industry, which is now more accessible than ever. That includes full-stack development, AI automation, AI integration, prototyping, custom development, and, of course, taking over what you've already built and turning it into a production-grade solution.
🔐 𝗞𝗲𝘆 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀:
1. AI Automation: streamlining workflows and business processes with AI
2. AI Prototyping: building fast, working proof-of-concepts to validate ideas
3. AI Hardening: taking over existing solutions and bringing them into production
4. Full-Stack Development: end-to-end product development, from frontend to backend
🌠 My background is in custom software development, and I spent a while working as a hands-on engineer. I was lucky enough to spend my entire career working with fast-growing, large-scale, and enterprise clients, representing an outsourcing vendor.
🌌 Apart from development activities, I was engaged in many others: interviewing engineers, participating in pre-sales, training programs, leading and driving development processes, and much more. I was always a company guy and was interested in and open to everything.
👴🏻 That’s where I matured as an engineer. I learned a lot along the way, saw how painful the software development process could be, and understood the pros and cons of different organizations, including where Fortune 100 companies struggle.
📺 I’m a professional engineer focused on delivering business outcomes for you — not a part-time freelancer juggling Upwork with a full-time job or doing it for extra income. I'm working with all types of clients and budgets.
✅ 99% Job Success Score; 100 + projects delivered — from idea to production-ready software
🛡 Expert-Vetted — interviewed and approved by the Upwork team
🚀 Fastest-Growing Upwork Profile Globally — $4M+ earned across multiple profiles since 2022
🌍 Most Recognized & Viewed Upwork Profile Worldwide
💰 Scaled 5 Upwork Profiles to $300K+ revenue each with strong inbound leads
🏢 Delivered Projects for Fortune 100 & Inc. 5000 Companies and UAE government
🧠 Led Pre-Sales, Estimations, Code Reviews & Tech Interviews for top-tier clients
💻 Even if we don’t end up working together, I’ll help you identify risks and guide you on how to make the product happen — because in the end, it’s all about mindset, not just coding skills.
💡 Answering a question how am I different in this competitive AI industry — the answer is simple: mindset. You can learn endless frameworks, libraries, languages — alright, cool, but mindset and deep understanding of this world outside and inside the industry is what really makes a difference.
𝐊𝐞𝐲𝐰𝐨𝐫𝐝𝐬:
Authentication, OAuth, SSO, JWT, Role-Based Access Control, Multi-Tenant Architecture, User Management, Admin Dashboard, Admin Panel, Stripe Integration, Payment Integration, Payment Gateway Integration, Subscription Management, Subscription Billing, Analytics Dashboard, Data Visualization, Reporting, Notification System, Email Integration, File Upload, Search Functionality, Internationalization (i18n), Audit Logs, Onboarding Flow
Steps for completing your project
After purchasing the project, send requirements so Denis can start the project.
Delivery time starts when Denis receives requirements from you.
Denis works on your project following the steps below.
Revisions may occur after the delivery date.
Requirements specification
We analyze requirements and provide a detailed timeline
Development
We start the main development phase and build the app based on requirements